Electric-incandescent-lamp holder



M 3, 1923 1,460,394 E. F. TWEEDY ELECTRIC INCANDESOENT LAMP HOLDER 4Filed Jan. 5, 1919 Fetented July 3, 1923.

STATES EDMUND FRANCIS TWEEDY, OF GLENBROOK, CONNECTICUT.

ELECTRIC-INCANDESGENT-LAMP HOLDER.

Application filed January 3, 1919. Serial No. 269,462.

To all whom it may concern:

Be it known that I, EDMUND FRANoIs Twnnor, a citizen of the UnitedStates, and resident of the town of Glenbrook, county of Fairfield,State of Connecticut, have invented certainnew and useful Improvementsin Electric-Incandescent-Lamp Holders for either stationary or portableuse, of which the following is a specification.

W While the features embodied in this invention are applicable to anelectric incandescent lamp under any conditions of use, they relateparticularly to so-called portable lamps, or electrical lighting devicesthat are adapted to be carried about.

The use of portable lamps is quite general, but on account of the firerisk involved, their use, under certain conditions has been discouraged,except when they are equipped with a protective device. A portable lamp,

to avoid this fire hazard, should be protected by a vapor tight globe,with a surrounding guard, where inflammable gases are present, and by asuitable guard alone under certain other conditions of use.

It has been found that the protective guard was properly in place whenthe portable lamp was approved for connection, is often left ofiafterward in actual use, particularly if the guard has once been removedto renew a burned out lamp.

1 have therefore invented an electric incandescent lamp holder, designedfor either stationary or portable use, which relies upon either thevapor proof globe or ,the protective guard, or a combination of both, tomake electrical connection so that the lamp may be lighted, and withoutsaid protective device being in lace, the electric light cannot be used.I y device is also arranged so that the loosenin or removal of the guardis not a sufiicient y convenient operation to impel the user to make useof this means of turning off the electric light.

The following iswhat I consider a good means of carrying out theinvention and the accompanying drawing should be referred to for acomplete understanding of the specification which follows:

In the drawing 2-- Fig. 1, is a sectional view of the lam holdingdevice.

Fi 2, shows a complete assembly with gear and lamp in position.

Fig. 3, is a reversed removed, and

Fig. 4 is a plan view of an adjacent part.

Similar reference numerals indicate like parts in all of the figureswhere they appear.

The main or enclosing member consists of a container cup or hollow bodymember 1 plan view of a part at one end of which is a handle 2 formedintegral with or secured to the hollow body body member and upon theprojections 4:.

The base 6 is provided with a central opening projecting into which is asemi-flexible metallic contact finger 9 adapted to make contactwith thecenter contact member in the base of an ordinary lamp, and a bindingscrew 10 provides a means whereby one side of a current supply line maybe secured to the contact finger 9.

A block 11 provided with a binding screw 12 receives the other side ofthe supply line and pins or studs 13 connect the block 11 with astationary contact plate 14 arranged upon the outer face of the base 6.

I also provide a plurality of countersunk perforations 15, 16, and 17through the base 6, the functions of which will be later described.

A receptacle 18 is arranged within the body member adjacent to the outerside of the base '6 and in this receptacle I secure a shell 19 for thebase of the lamp which shell has a contact plate 20 extending parallelto and adapted to impinge upon the contact plate 14 when the lamp islighted.

The receptacle 18 is also provided with a plurality of. countersunkperforations 21, 22 and 23, as will be noted upon reference to thesectional view, Figure 1. The adj acent portions of the recesses in thebase 6 and receptacle 18 are of an increased diameter and in theseadjacentportions and extending between the members 6 and 18 arecompression coiled springs as shown at 24. Screws secure the members 6and 18 loosely together and limit the outward motion of these parts, thesprings 24 acting to force the receptacle 18 away from the base 6 whenconditions make it possible.

In the screw-threaded open end of the body member 1, I insert ascrew-threadedring 26, which forms the bottom, or innermost end of aguard lobe or other device 27. The screw threa ed portion 26 bears uponthe run of the receptacle 18 and when a lamp is in the shell 19 and theguard 27 is screwed down upon the rim of the receptacle 18, the samewill be forced toward the. base 6 against the compression of the springs24, the contact plate 20 engages with the plate 14, and with suitablesupply lines attached at 10 and 12, a lamp screwed in the shell 19 willbe illuminated. Should the guard 27 be omitted, or should it be notproperly secured in the socket 1, the contact between 14 and 20 will bebroken. This insures that a guard 27 must be in proper position at alltimes when the lamp is in use and comprises one of the principal ad--vantages of my invention.

As shown in Figure 2 I vmay employ a guard 30 or other device which willbe secured in the hollow body member by means of a bayonet joint. Such ajoint consists of a slot 32 one edge of which is serrated as shown at 33and a pin 34 is secured in the body 3 and adapted to be engaged in theslot '32 securing the guard or other device in position and it will benoted that the slot 32 is inclined so that suflicient pressure mayalways be brought to bear upon the receptacle 18 to move this member aproper distance inward to obtain proper contact between the plates 14and 20.

Any number of slots 32 and corresponding pins 34 may be employed.

The handle 2 formed integral with or secured to the hollow body member 1should be tubular. The diameter of the hollow body member, length ofhandle and size of all of the parts may be changed at will or othersimilar operating parts may be substituted and other modifications maybe made within the scope of the appended claims without departing fromthe principle or sacrificing the advantages of this invention.

I may provide means for securing the guard in position and at the fullextent of its motion in either direction and such a means may consist ofa screw 35 as shown in Figure 2.

c Having carefully and fully described my invention-what I claim anddesire to secure by Letters Patent is 1. A lamp holder" comprising ahollow body member, a base within said hollow body member and adapted tobe removably secured therein, a lamp supporting receptacle within saidbody member and means between said base and said receptacle for forcingthe same away from each other and independent means for forcing saidreceptacle toward the base.

2'. A lamp holder comprising a hollow body member, a base adapted to besecured therein, a receptacle adjacent to said base and adapted tosupport a lamp, means for yieldably forcing said receptacle away fromthe base, contacts carried by both the receptacle and base, andindependent means to hold the contacts in engagement when the lamp is inoperation.

3. A lamp holder comprising a hollow body member, a base adapted to beengaged therein a contact plate carried by the base for connection withone supply line of an electric circuit, a receptacle adjacent to saidbase and provided with lamp supporting means, a movable contact carriedby the receptacle means for forcing the said receptacle away from thebase, and independent means received in said cup for causing saidreceptacles to impinge upon the base.

4. A lamp holder comprising a hollow body member, a base arranged insaid cup member, and having a contact, a receptacle having lampsupporting means and a con tact yieldable means. between sai-d base andreceptacle for forcing the receptacle away from the base to open thecircuit throu'h said contacts and independent means or moving thecontacts into engagement to close the circuit. 1 i

5. A lamp holder comprising a hollow body member, a base adapted to besecured therein, said base being provided with a plurality of contactsarranged on opposite faces, and a receptacle having a lamp supportingmeans and a contact, means for yieldably forcing said receptacle awayfrom the base means for limiting the movement of the receptacle relativeto the base, and independent means to hold the contacts in engagement.

6. A lamp holder comprising a hollow body, a guard globe; engaging saidbody a pass member supported within said body, a

lamp bulb receptacle supported within said body and having spacedrelation with said base member when said guard globe is not inserted insaid body and electrical contacts on the receptacle adapted to engageeach other and comdplete part of an electric circuit when sai guardglobe is inserted in said body.

Signe at the cit ofNew York, county and State of New ork, this 17th dayof, December 1918. a

EDMUND FRANCIS TWEEDY.

